Descripción
1.4x Teleconverter for Canon RF Telephoto Lenses
Overview
The Canon Extender RF 1.4x sits between a compatible RF telephoto and the camera and multiplies the focal length by 1.4, at the cost of one stop of light. A 400mm becomes a 560mm, and it does so in 20.3 mm of length and 225 g — far less than carrying a longer lens.
Key features
- 1.4x magnification: 400mm becomes 560mm, 600mm becomes 840mm.
- One stop of light lost: an f/4 lens works at f/5.6 with the extender fitted.
- 7 elements in 4 groups: an optical design matched to the RF telephotos it is designed for.
- Dust and moisture resistant, like the L lenses it pairs with.
- 225 g and 20.3 mm long: it lives in a pocket of the bag, not in the space a lens would take.
Specifications
- Mount: Canon RF
- Image size: full frame
- Magnification: 1.4x
- Lens construction: 7 elements in 4 groups
- Dust and moisture resistance: yes
- Dimensions: 71.2 x 20.3 mm
- Weight: 225 g
- Supplied accessories: Extender Cap RF, LP811 pouch, Lens Dust Cap RF
What it is good for
- Wildlife and birds: the extra reach that turns a distant subject into a frame-filling one.
- Sport from the sidelines: 1.4x is often exactly the difference between cropping and not.
- Travelling light: reach without a second telephoto in the bag.
Check compatibility before ordering: RF extenders only fit certain RF telephoto lenses, because the front element protrudes into the lens barrel.

